Hair brush



FIG. 1 is an isometric view of the hair brush;

FIG. 2 is an elevation view of the hair brush showing one end thereof;

FIG. 3 is an elevation view of the other end of the hair brush;

FIG. 4 is an elevation view of the hair brush showing one side thereof, the other side being the mirror image thereof;

FIG. 5 is a plan view showing the top of the hair brush; and,

FIG. 6 is a plan view showing the bottom of the hair brush. 

The ornamental design for a hair brush, substantially as shown and described. 